Pipe wrench



April 24, 1945. 1 PW. DAVIS v 2,374,423

' PIPE WRENCH Filed Dec. 50, 1942 Patented Apr. 24, 1945 UNITED STATESPATENT OFFICE PIPE WRENCH Frederick W. Davis, East Hartford, Conn.Application December, 30, 1942, Serial No. 470,573

1 Claim. (Cl. Est-1103) My invention relates to the class of devicesabove named, and an object of my invention, among others, is theprovision in a wrench of means for effectually taking up lost motionbetween the fixed and movable jaws and to minimize the. number of partsemployed in mechanism for effecting this purpose. I

One form of a, wrench embodying'my invention and in the construction anduse of which the objects herein set out, as well as others, may beattained is illustrated in the accompanying drawnoted by the dotted line4-4 of Fig. 1.

In the accompanying drawing the numeral 5 denotes the body or stock ofmy improved wrench, this comprising a bottom fi andsides I preferablyintegrally formed together with a coverplate 8 removably attached to thebody as by means of screws, as shown in Fig. 3. A pawl support 9 in theform of a dividing piece extends lengthwise within the body, aboutcentrally thereof. This support also acts as a support for the cover 8which isattached thereto as by means or screws. It forms recesses Ill-IIfor jaws I2-I3, thejaw I2 being substantially stationary and formed atthe end of a handle I4 while the jaw I3 is movable and comprises a shankI5.

In the operation of the device it willnow be seen that the pawl I9having been operated to permit the jaw I2 to loosely engage a piece ofpipe 29, a lateral movement of the handle to turn the piece of pipe willbring the jaws I2 and I3 into tight engagement with the piece of pipe,

the pawl I9 supportin the jaw I3 and the cam slot 21 acting on thecamming pin 28 forcing the pressure occasioned by force appliedto thehan- These jaws are provided with gripping teeth ,I6Il and the shank I5is provided with ratchet teeth I8 on one edgewhich teeth are engaged bya pawl I9 pivotally mounted in a recess 20 in the upper edge of the pawlsupport, as shown in Fig. ,3. This pawl has a pivot pin 2I which ismounted at one end in a hole in the support 9 and its opposite endserves as a pivot in the hole 22 in the cover plate 8. A finger piece 23extends through an arcuate slot 24 in the cover plate as a means foroperating the pawl to engage it with or disengage it from the ratchetteeth I8.

A guide pin 25 projects from the handle I4 in proximity to thejaw I2thereon and a camming pin 26 extends from the handle I4 into a cam slot21 in the cover plate 8, asshown in Fig, 3

of the drawing, the guide pin 25 extending into somewhat wider to permitthis lateral movement. 1

out.

dle takes place.

In accordance with the provisions of the patent statutes I havedescribed the principles of operation of my invention, together with thedevice which I consider to represent the best embodiment thereof; butdesire to have it understood that the device shown is only illustrativeand that the invention may be carried out by other means and applied touses other than those above set A pipe wrench comprising a substantiallyrectangular stock having parallel channels with thin side walls formingopposite sides of the stock and extending the entire length of thestock, and a thin dividing wall having a shallow cut-away por- 1 andhaving ratchet teeth formed on the inner the outer side pieces of saidchannels and conforming to the boundaries of said stock, all of theparts consequently being confined within the width of said stock, ahandle secured to the shank of said active jaw, a jaw formed on the endof the movable jaw member at right angles to the shank thereof to enactwith said active jaw in grasping an article between them, a guide pincarried by the active jaw and extending through a guide slot in thecover plate, a cam pin on said activejaw extending through a cam slot insaid I cover plate and a finger piece on said pawl extending through acurved slot in said cover plate.

raaonaiox w. DAVIS,

